- What are the drawbacks of Heroes 3? (What didn't you like about it?)

Freikors, thank you for the detailed post! In principle, there's almost nothing to argue with: yes, "Heroes 3" has its flaws, but we've already gotten used to them, and they mainly affect tournament games on random maps (where the generation is often far from ideal). The authors of custom maps, especially single-player ones, take measures to compensate for the game's shortcomings.
As for mods for "Heroes 3": they have added various new features to the game, but it's hard to say if there is even one that has actually improved the balance or fixed the gameplay flaws (primarily, where the AI would be noticeably "smarter," because this is probably the most difficult task compared to adding new "features").